针对航空中应用的钛合金薄壁盘环零件激光快速成形修复(LRR),建立了3D参数化有限元模型,分析了修复过程中薄壁盘环件的应力和变形演化规律。计算结果表明,应用LRR技术可以成功地实现对薄壁盘环零件的修复。彻底冷却后,修复件的残余应力属于低残余应力水平,零件水平薄壁与竖直薄壁交界处的残余拉应力较大,修复件的整体变形也比较小,两薄壁均在靠近其外端部位置的变形量比其内部要大。冷却阶段的应力分布与熔覆刚完成时的应力分布规律基本相同。随成形修复过程的进行,薄壁修复件的最大变形量增大,冷却时,修复件最大变形量随时间的增加而逐渐减小。 Aimed at the rapid prototyping and repairing (LRR) of titanium alloy thin-wall disk ring parts used in aeronautics, a 3D parametric finite element model was established and the stress and deformation evolution rules of the thin-wall disk ring parts during the repairing process were analyzed. The results show that the application of LRR technology can successfully achieve the repair of thin-walled disc ring parts. After complete cooling, the residual stress of the restoration belongs to the low residual stress level. The residual tensile stress of the part horizontal thin wall and the vertical thin wall is larger, and the overall deformation of the restoration is relatively small. Both thin walls are close to the outer end The location of the deformation than the larger. The stress distribution in the cooling stage is basically the same as the stress distribution just after the cladding. With the progress of the forming and repairing process, the maximum deformation of the thin-wall restoration increases, and the maximum deformation of the repairing piece gradually decreases with the increase of the cooling time.